russell-clarke



E. RUSSELL-CLARKE- CALCULAT ING MACHINE Filed Dec. "9, 1919 19 Sheets-Sheet 1' Oct. 23 1923.

E. RUSSELL-CLARKE CALCULATING MACHINE Oct. 23, 1923.

E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec.-9, 1919 19 Sheets-Sheet Oct. 23, 1923. 1,471,683

- E. RUSSELL-CLARKE;

CALCULATING MACHINE 19 Sheets-Sheet 4 FiledDec. 9, 1919 FIG .5 M

Oct. 23, 1923. 1,471,683

E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet 5 Oct. 23 1923. 1,471,683

E. RUSSELL-CLARKE CALCULAT ING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet 6 4 my/66M 2 Oct. 23, 1923.

E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet '7 Wily-1 H21;

Oct. 23, 1923.

E. RUSSELL"CLARKE CALCULAT-ING MACHINE Filed Dec. 9, 1919 19 Sheets-"Sheet 8 .0204, Max,

E. RUSSELL-CLARKE CALCULAT ING MACHINE 19 Shets-S heet 9 Filed Dec. 9, 1919 v E. RUSSELL-CLARKE CALCULATING MACHINE l9v Sheets-Sheet 10 Filed Dec. 9 1919 FIG/4.

Oct. 23, 1923. 1,471,683

- E. RUSSELL'CLARKE CALCULATING MACHINE Fil ed Dec. 9, 1919 19 Sheets-Sheet 11 v WQA Oct. 23, 1923.

E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 19194 19 Sheets-Sheet 15 Oct. 23, 1923. 471,683

E. RUSSELL'CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet )2 E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet 14 2 Pa, Pa) III/I1 VIII/A III/6711111, III/11111471 YIIIIIIII/IIA 6 2 r E. RUSSELL-CLARKE CALCULATING MACHINE- Filed Dec. 9, 1919 v 19 Sheets-Sheet 15 Oct. 23, 1923. I I,471,683

E. RUSSELL-CLARKE CALCULAT ING MACHINE Fil ed Dec. 9, 1919 '19 Sheets-Sheet 36 .mm WW.

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Oct. 23, 1923.

1,471,683 E- RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet 17 Oct, 23, 1923. 1,471,683

E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 '19 Sheets-Sheet 1a E. RUSSELL-CLARKE CALCULATING MACHINE Filed Dec. 9, 1919 19 Sheets-Sheet 19 I Patented- Oct. 23, 1923.

PATEN OFFICE.

UNITED STATES EDWARD RUSSELL-CLARKE. DECEASED; BY FRANCES IV IAUD BD'SSELL-CLARKE, Ex-

ECUTRIX, OF LONDON, ENGLAND, ASSIGNOR TO AUTOKALSYNDICATE LIMITED,

01 LONDON, ENGLAND.

CALCULATING MACHINE.

Application filed December 9, 1919. Serial at. 343,829

Taallwhomitmy concern:

Be it known that I, Mrs. FRANCES 'MAUD RUssnLn-CmRKn, a subject of the King of Great Britain, and residin at, London, in 5 England, sole executrix of Dwain) RUSSELL- CLARKE, late a subject of the King of Great Britain, who invented certain new and useful Improvements infiCalculating Machines, of which the following is a specification.

This invention relates to calculators more especially for performing multiplication and of the type in which complex sums can be done in order to ascertain for example the total cost of a number of articles of which the individual price is known.

According to this invention the calculator comprises a series of members each con-- structed and movable parallel to itself in two directions at right angles into positions which are determinable by the setting up of one or a pair of stops so that the member will indicate a product, the amount of these products being ascertained and added by mechanism which presents the total. The 2 stops for positioning the product members are selected and set up by mechanism actuated b denominational selecting and numeral keys the latter being operative only as and when determined by the part of this v mechanism which is actuated by the selective keys. Thus until one or other of the denominational selectin ikeys has been operated the movement 0 a numeral key will produce no effect in the machine and even after the numeral keys have been rendered alive by the operation of a selecting key the numeral keys will only remain intha-t state while they are used for performing operations the extent of which are determined by the action of theselecting keys.

The machine may be said to' comprise the following parts I 1. The selective mechanism controlled by the denominational selecting and numeral 4 keys. I

2. Theroduct plates which are positioned by t e stops set up by the keys in accordance with the sum to be performed by the machine.

3. The adding mechanism by which the several products are collected and result presented;

4. The actuating mechanism by means of which when the keys have been depressed in.

order to feed into the machine the necessary data the various parts of the machine are caused to erform their several functions so as to pro uce the desired result.

The chief features in these several parts may be briefly enumerated as follows The principal feature of the selective mechanism is a series of longitudinally movable stop settlng rods whose ends are all grouped like a chess-board in rows parallel in two directions and in one plane. A series of knives face the ends of these stop setting rods and. each knife by the depression of-a numeral key is reciprocated towards and between the grouped ends of the setting rods whose ends can be shifted in rows at right angles to the knives so as to bring the ends of all the rods in a selected row into the paths of the knives. The selecting of, the

rows of setting rods is effected b a series of cams mounted on a shaft tow ich rotaated member the positioning of which is primarily determined by the denominational selecting and in a secondary senseby the numeral keys. An escapement controls the movement of the differentially actuating member and the rotation of the cam shaft. I

Rods similar to the stop-setting rods and constituting an inhibiting device can have their ends set out into the path of a knife by the action of certain cams on the cam shaft.

Since the operation of these cams also is controlled by the denominational selecting keys the latter determine the ulti- These product plates are conveniently di-sposed in two groups each plate being provided with V-shaped guides by means of which it is positioned by the stops set up in accordance with the value represented by these stops. The general construction and operation of the product plates is as described in the specification of United States of America Letters Patent No. 1,088,207. Each plate is arranged so that it can move parallel to itself in two directions at right angles into any position determinedby the stops set up. Each plate carries a mechani- (5 tion is imparted from a differentially actu- 

